Spiral Bevel Gear Summary No. 75229687 Date: 05/06/05 Page 1 of 2
Comb. 20 X 24 DP 5.7500
PA 20 Spiral Angle 35 Cone Dist. 2.717 Face Width 0.750
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Spiral Angles: Machine: No. 26 Method: Single Side
Inner 33D 6M Spiral No. 2 Shaft Angle: 90
Outer 37D 39M
GEAR PINION GEAR PINION
Addendum 0.086 0.114 Norm Chord Adden 0.085 0.113
Working Depth 0.200 Norm Chord Thick 0.202 0.220
Whole Depth 0.222 Backlash Allowed 0.006 / 0.013
Pitch Angle 50D 12M 39D 48M Dedendum 0.136 0.108
Face Angle (blanks) 52D 28M 42D 40M Hand of Spiral LEFT RIGHT
Root Angle 47D 20M 37D 32M Cutting Method VERSACUT VERSACUT
Dedendum Angle 2D 52M 2D 16M Circular Thickness 0.261 0.286
Outside Diameter 4.284 3.654
Pitch Apex To Crown 1.673 2.014 Tooth bearing: 0.377 (Short) 50%FW
Profile Mismatch: 0.000233
Tooth Prop System: Spec Tth Proportions Omega (2 x Roller Ratio): 1.024
GEAR PINION
Cutter Specifications: Cutter Specifications:
Cutter Diameter 6.00 Cutter Diameter 6.00
Cutter Number 12V - 20D Cutter Number 12V - 20D
Point Width / Letter 0.040 Y Point Width / Letter 0.040 Y
MACHINE SETTINGS - FINISHING:
Outer Inner Outer Inner
GEAR: (Concave) (Convex) PINION: (Concave) (Convex)
Eccentric Angle 21D 44M 21D 33M Eccentric Angle 22D 21M 20D 56M
Sliding Base 0.000 Sliding Base 0.000
Blank Position STD Blank Position STD
Vertical Offset: 0.000 Vertical Offset: UP DN
Cradle Angle 203D 51M 205D 7M Cradle Angle 357D 59M 356D 43M
Decimal Ratio 0.41655 Decimal Ratio 0.41655
Machine Root Angle 47D 20M Machine Root Angle 37D 32M
Cradle Test Roll 30D 0M Cradle Test Roll 20D 0M
Work Test Roll 39D 3M Work Test Roll 31D 14M
Nc/75 Ratio Gears 51/74 X 55/91 Nc/75 Ratio Gears 51/74 X 55/91
Roller Eccentricity 0.264 Roller Eccentricity 0.665
Roller Angle 343D 28M 163D 28M Roller Angle 247D 38M 67D 38M
Roller Gears 40/50x60/90 40/50x60/90 Roller Gears 40/50x60/90 40/50x60/90
30' BIAS OUT CHANGE - PINION
Outer Inner
(Concave) (Convex) Maximum point width: GEAR PINION
Work Test Roll -30 Min 30 Min Outer Tooth Space 0.127 0.128
Blank Position ADV 0.047 WITH 0.047 Inner Tooth Space 0.102 0.101
Sliding Base WITH 0.029 ADV 0.029
Eccentric Angle -5 Min 5 Min Tooth thickness change
Change in Nc/75 -.0067 0.0067 per index notch: .000476 .000397
To correct for Bias IN, reverse Ideal Roller Gearset
directions and signs shown. Ratio = 0.53333
Spiral Bevel Gear Summary No. 75229687 Date: 05/06/05 Page 2 of 2
Comb. 20 X 24 DP 5.7500
PA 20 Spiral Angle 35 Cone Dist. 2.717 Face Width 0.750
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Machine: Spiral No. 2 No. 26
GENERATOR ROUGHING SETTINGS
GEAR PINION
Cutter Number 12 12
Cutter Point Width 0.040 0.040
Cutter Diameter 6.0 6.0
Eccentric Angle 21D 40M 21D 42M
Sliding Base 0.000 0.000
Blank Position STD STD
Blank Offset 0.000 0.070 UP
Cradle Angle 204D 51M 356D 39M
Decimal Ratio 0.41655 0.41655
Machine Root Angle 47D 7M 37D 8M
Cradle Test Roll 30D 20D
Work Test Roll 39D 3M 31D 14M
Nc/75 Ratio Gears
Roller Eccentricity 0.264 0.665
Roller Angle 163D 28M 247D 38M
Roller Gears 40/50 x 60/90 40/50 x 60/90